Txheej txheem cej luam: Dab tsi yog AC298 Internal Epoxy Barrier Yeeb Nkab Txheej?
SIB 298yog ib qho specification teem los ntawmUL (Underwriters Laboratories)uas tswj kev siv thiab kev ua haujlwm ntawmfusion-cov khoom sib txuas epoxy (FBE)coatings siv rau covsab hauvtiv thaiv cov yeeb nkab steel thiab fittings.
Hauv cov ntsiab lus yooj yim, nws yog tus qauv zoo thiab kev ua tau zoo rau "yas" hauv ob sab phlu siv rau sab hauv cov kav hlau los tiv thaiv corrosion thiab tswj cov kua dej purity.
Lub hom phiaj tseem ceeb yog tsim kom muaj kev tiv thaiv tsis tu ncua ntawm cov yeeb nkab steel phab ntsa thiab cov khoom xa tawm (dej, roj, roj, slurry, thiab lwm yam).
Cov tsav tsheb tseem ceeb rau kev siv Internal Epoxy txheej
Kev Tiv Thaiv Corrosion:Qhov no yog qhov laj thawj tseem ceeb tshaj plaws. Hlau corrodes thaum raug dej thiab lwm yam corrosive ntsiab (xws li ntsev, acids, los yog H₂S nyob rau hauv "qaub" roj thiab roj). Lub epoxy txheej ua raws li kev tiv thaiv inert, cais cov hlau los ntawm ib puag ncig corrosive.
Tswj Flow Efficiency (txo kev sib txhuam):Lub epoxy du nto muaj qhov sib txhuam qis heev (feem ntau yog Hazen-Williams "C" yam ntawm 150+). Qhov no txo qis kev kub ntxhov thiab kev poob siab, tso cai rau cov dej ntws ntau dua lossis txo qis zog piv rau cov hlau tsis muaj coated.
Khaws cov khoom Purity:Cov txheej tiv thaiv xeb, nplai, thiab lwm yam corrosion los ntawm - cov khoom los ntawm kev sib kis ntawm cov kua xa tawm. Qhov no yog qhov tseem ceeb tshaj plaws rau:
Cov dej haus:Xyuas kom dej zoo thiab kev nyab xeeb.
Kev ua zaub mov thiab dej haus:Ua raws li kev cai huv huv.
Pharmaceuticals:Kev ruaj ntseg ntawm cov khoom.
Tiv thaiv Scale thiab Deposit Build-up:Qhov du, tsis yog - nplaum nplaum ua rau nws nyuaj rau paraffin, asphaltines, lossis ntxhia nplai kom ua raws, txo kev tu thiab pigging zaus.
AC298 Standard: Nws npog dab tsi?
AC298 tus qauv yog cov ntaub ntawv nruj uas ua kom muaj kev sib xws thiab kev ntseeg tau. Nws npog:
Khoom Muaj Peev Xwm:FBE hmoov nws tus kheej yuav tsum dhau qhov kev ntsuam xyuas tshwj xeeb rau lub cev, tshuaj, thiab kev ua haujlwm zoo.
Txheej txheem thov:Nws txhais cov kev cai rau kev npaj cov yeeb nkab nto, cua sov, daim ntawv thov, kho, thiab tshuaj xyuas.
Txheej Txheem:Nws teev qhov tsawg kawg nkaus kev ua tau zoo rau cov txheej tiav, suav nrog:
Thickness:Ua kom muaj qhov tsawg kawg nkaus thiab cov yeeb yaj kiab zoo ib yam.
Adhesion:Cov txheej yuav tsum tsis tev los yog tawg.
Flexibility:Nws yuav tsum tiv taus cov yeeb nkab dabtsi yog khoov yam tsis muaj cracking.
Impact Resistance:Nws yuav tsum tiv thaiv kev puas tsuaj los ntawm kev tuav.
Cathodic Disbondment:Ib qho kev ntsuam xyuas tseem ceeb uas ua kom cov txheej txheej tsis degrade los yog tawg ntawm cov hlau yog tias muaj cov hnub so me me (qhov tsis zoo) thiab kev tiv thaiv cathodic raug siv.
Chemical Resistance:Resistance rau cov tshuaj los yog kuab tshuaj.
Daim Ntawv Thov Txheej Txheem (theem-los ntawm-Step)
Daim ntawv thov ntawm AC298 raws li txheej txheej yog kev tswj tau zoo, ntau- txheej txheem txheej txheem feem ntau ua nyob rau hauv cov txheej txheem tshwj xeeb.
Ntxuav & Degreasing:Cov kav dej yog ntxuav kom tshem tawm cov roj, roj, thiab av.
Abrasive Blasting (Kev Npaj Nto):Qhov no yog ib kauj ruam tseem ceeb. Cov yeeb nkab sab hauv yog blasted nrog steel grit los yog tua rau ibZe ntawm -White Hlau (NACE No. 2 / SSPC-SP 10)kev huv. Qhov no tsim ib qho ntse, angular thauj tog rau nkoj profile (feem ntau 2-4 mils), uas yog qhov tseem ceeb rau kev sib txuas ntawm cov epoxy.
Cua sov:Cov yeeb nkab huv si tau dhau los ntawm lub tshuab hluav taws xob induction, nce cov hlau kub mus rau qib meej, feem ntau ntawm 180℃thiab 250℃(356℃F - 482}℃F). Qhov kub thiab txias yog qhov tseem ceeb rau kev kho kom zoo.
Daim ntawv thov txheej:Cov yeeb nkab uas muaj cua sov tau hloov mus rau qhov chaw nres tsheb uas muaj rab phom txau. Electrostatically them, qhuav FBE hmoov yog txau. Kev sib xyaw ua ke ntawm cov cua sov thiab cov nqi hluav taws xob ua rau cov hmoov yaj thiab fuse mus rau cov hlau nto yuav luag tam sim ntawd, tsim cov yeeb yaj kiab txuas ntxiv.
Kho:Cov yeeb nkab txuas ntxiv tig thaum nws txav mus los ntawm thaj chaw kho, tso cai rau cov epoxy ntws tawm tag nrho thiab ua tiav nws cov ntoo khaub lig tag nrho - txuas cov tshuaj lom neeg.
Quenching:Tom qab kho, cov yeeb nkab feem ntau yog dej -quenched kom txias rau kev tuav thiab tshuaj xyuas.
Kev tshuaj xyuas & kuaj:Qhov no yog qhov uas AC298 ua raws li kev txheeb xyuas. Txhua lub kav dej raug tshuaj xyuas rau:
Kev Pom Kev Tsis Zoo:Tshawb xyuas cov npuas, khiav, lossis kev sib kis.
Zaj duab xis Thickness:Siv cov khoom siv hlau nplaum lossis hluav taws xob.
Soj ntsuam xyuas:Siv lub siab - qhov ntsuas hluav taws xob hnub so kom pom cov pinholes lossis qhov tsis zoo hauv cov txheej txheej insulating.
Adhesion:Cov kev ntsuam xyuas ib ntus raug ua.
Kev lag luam thiab kev siv
Roj & Roj:Cov kab khiav, sib sau cov kab, cov kab txhaj tshuaj, thiab cov kav dej xa mus rau ob qho tib si qab zib thiab qaub.
Dej & Dej pov thawj:Cov dej tsis huv, cov dej uas siv tau, thiab cov kav dej kho tau zoo.
Mining:Slurry pipelines rau thauj ore concentrates.
Industrial:Cov txheej txheem piping hauv cov nroj tsuag tshuaj, tsim hluav taws xob, thiab ib puag ncig marine.
Qhov zoo thiab qhov txwv
| Qhov zoo | Kev txwv |
|---|---|
| Zoo heev corrosion thiab tshuaj tiv thaiv. | Nws tuaj yeem raug puas tsuaj los ntawm kev cuam tshuam rau cov neeg kho tshuab (xws li, xaum ib lub cuab yeej hauv). |
| Superior adhesion thiab yooj. | Yuav tsum muaj kev txawj ntse thiab kev tswj cov txheej txheem nruj. |
| Smooth nto rau txhim kho ntws. | Muaj qhov ntsuas kub siab (feem ntau ~ 100-120℃/ 212-248℃F). |
| Lub neej ua haujlwm ntev (50+ xyoo thaum siv kom raug). | Tsis haum rau cov kav dej uas yuav nquag rov- sib npaug lossis txias heev- khoov tom qab txheej. |
| Ib puag ncig tus phooj ywg (solvent-dawb). | Tus nqi pib yog siab dua cov yeeb nkab uas tsis muaj coated, tab sis tus nqi ntawm lub neej yog qis dua. |
Xaus
AC298 Internal Epoxy Barrier Yeeb Nkab Txheej yog cov qauv kev lag luam rau siab -kev ua tau zoo, ntev- kav ntev hauv cov yeeb nkab tiv thaiv.Los ntawm kev qhia txog AC298, engineers thiab project tswv tuaj yeem ntseeg tau tias lawv tau txais cov khoom lag luam uas tau tsim los ua kom zoo ib yam, txheeb xyuas tau, thiab siab - tus qauv zoo, ua kom muaj kev ncaj ncees thiab kev ua haujlwm ntawm lawv cov kav dej tau ntau xyoo lawm.
